Cooling ore.



w. H. HUBBARO; 1in. A COOLING ORE;

. APPLICATION FILED HOV. 30', |912.

Famed Aug. 10, 1915.

4 SHEETS-SHEET l.

Arron/vers l w. H. Huss/mmm.

COOLING ORE.

APPLICATION FILID NOV. 30| i912.

Patented Aug; 10, 1915.

4 SHEETS-SHEET 2.

w. H. HUBBARD, 1R.

COOLING ORE. i APPLICATION FILED NOV. 30. 1912.

1,1495264. Y Patented Aug. 1o, 1915.

4 SHEETS-SHEET 3.

W. -H. HUBBARI), IR.l

COOLING ORE. APPLICATION FILED NOV. 30, |912.

1,1%9641 Patented Aug. 10, 1915.

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/NVENTOR ATTORNEYS man erariale narrar orare WILLIAM H. HUBBARD, J R., OF SALIDA, COLORADO, ASSIGNOR T0 THE OHIO & COLO- RADO SMELTI'NG & REFINING CO., COLORADO.

0F DENVER, COLORADO, A CORPORATION OF COOLING ORE.

Application filed November 30, 1912. Serial No. 734,315.

To all whom t may concern y Be it known that l, WILLIAM H. Bano, J r., acitizen-of the United States, residing at Salida,`coiirltyof Chaffee, State of Colorado, have` invented certain new and useful Improvements in Cooling Ure; and' l do hereby declare the following to` be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertams to vmake and use the same. l

The present invention relates to cooling i ores orv the like from metallurgical -or other furnaces, such, for example, as the roduct of a pre-roasting furnace of thel odfrey or analogous type, which is to be further treated 'on Dwight and Lloyd machines or the like.

The object of the invention is toelfect the cooling of the ore at the intermediate st age quickly and cheaply, at the same time avoiding the annoyance of dust and smoke and bringing the ore into good physical condition for handling easily andfurther roastin Li accordance with the invention, the hot `ore is distributed in a comparativelythin layer on a lflat table, or a series of tables and is rabbled during its movement between tlie places of charge and discharge to continually expose fresh surfaces of ore to a cooling medium or mediums. The coolling tables for supporting the ore in this way may have a variety of forms; they may be circular, linear or otherwise shaped, and may be arranged in-tiers to form superposed tables,if desired. So, also, the rabbles forV rabbling the ore may take Various forms, and may have the various arrangements relatively to the cooling tables. However, it is preferable 'that either the tables or the rabbles, or both, should be movable in such manner as'to produce a relativemovement between the two, and also soas to produce a movement of the ore'on the table in a path different from the line of movement of the table jor the rabbles,

and also extended in length -so far as prac.

and providing stationary rabbles, on'by rotating the rabbles and providing a stationary table, so that/"in eithe'rcase,A the orel is periodically `forced lagainst rabbles to rabble it and to ,simultaneously shift it on the table progressively toward fthe discharge outlet. Infthis Way` the o're is automatically' discharged after being\repeatedly rabbled to expose .fresh surfaces to theA cooling medium or mediums along 'an extended path lacross the'table and yet within a compact space of operation.

` The cooling medium may be a currentof gas, such as air, moved over and in contact with the ore on the table or through it, and ofsuch volume and temperature as Vto pro- -duce the necessary reduction in thetemperature of the ore under the conditions prevailing. As` an alternative method of cooling, heat from the ore may be transferred to a cooling medium, such as water, circulated -in contact with the under side of the table v by conduction through the table, or liquid may be sprinkled on the ore to abstract the heat of vaporization of the liquid from the ore. Furthermore, all, or any two of these cooling means may be used together te effect the desired reduction in temperature of the ore during, its passage from the place of charge to the place of discharge.

In the accompanying drawings, illustrating the preferred form and several modifications of apparatus suitable for carrying out my preferred method ofv cooling ore, Figure l represents an elevation, partly in section and partly broken away, of the arrangement wherein the table is stationary, while the rabbles are rotatable; diagram of the movement of the ore on the table in Fig. l; Fig. 3 represents an elevar y tion, partly in section, of an arrangement wherein the table is rotatable, while the rabbles are stationary, and whereinthe ore on 4the table is sprinkled with the cooling'liq- Fig. 2 is a set at suchl an `angleto this line that when away, of an apparatus havingtwo superw posed tables; -and Fig. 8

movement of thev ore A'on the lower table of -lteferring to Figs. land 2I of the `draw'- 'I is a Adiagramof the ings, the columnsv 1 resting on a suitable foundation 2 support the hood 3 over the stationary circular table 4. A vertical shaft' 5 mounted in suitable'bearings 6 isl driven byfthegearing. and carries the arm 8 provided with the rabbles 9. The rabblesg9 are arranged along Substantially a diametrical line Aacross the circular table, and are each the driving shaft 5 is rotated the ore on the table is' carried .along a substantiall-yspiral the broken lines in Fig; provided;I 4with a' staek `10v path, indicated by 2. e The hood 3 is to conduct the dust andgases away from the apparatus.

may extend directly from a preheating fur- I Qcentral opening through the discharge place arranged to use, l0'

-\ case,

tinually exposing fresh surfaces thereof tovnace or from any other suitable place andcharge the hot ore onto'the table at a place near the outer periphery thereof. i The dis-` charge ore conduit 12 is fastened-to the under side of the table around its discharge openingl and leads to any desired place, as a` storage bin or a conveyer. I

When the shaft 5 is rotated'at the properA speed by the gearing 7 and the oreis being charged at the proper rate of feed onto the outer periphery from .the conduit 11 in Figs. 1 andv 2,' the rabbles 9 push the ore in a comparatively thin layer around the ltable and inwardly thereon ina spiral path and finally into the 13, from whence it passes conduit 12- into a store or convey the ore. In this period the outside over ,and in contact' with the ore and into the stack 10, either'by a natural draft brought about by the hot gases and heated air, .or by a suitable fan. In either the air moves freely without substantial confinement bv the apparatus at any point, while the volume of the cooling air isA to bring about regulated in any suitable way of the the desired reduction of temperature -ore in its'movement on the table. The ore is contact with the cooling air, the-ore is progressively and efficiently cooled throughout its mass.

In Figs. 3 and 4, the circular itable 19 is fastened to the driving shaft 5 and is rotatable therewith, while the rabbles 9 are sta# discharged from the on .the ore,-preferably at cated diagrammatically-in'Fig. 4, ljust be-A '.tlhie driving shaft 5 vs upplypipe 21- which The charging ore conduit 11 spiral and of the stationary table '4' table.

.during-which the ore j is moved from the charging conduit to the ydischarging conduit, the air is drawn from table, from whence .so that an extended sages 37 passing tionary. n K onto the table nearthe center. thereof, and 1s effect of the current of air, water is sprinkled hind therabbles inthe. direction ofV rotation of` the table where the ore has just been overturned. ,The sprinkling apparatus comprisesa stationary pipe 20 closed at its ends land provided with a series of holes through O which the water Apasses out into the freshlyV j" This pipe 20 is bent around and's connected to a y communicate'swith a source of water supply. .i

In Figs. 3 and 4, the ore ismoved around exposed ore,

and outwardly upon the table `4in an extendsubstantially the yform of a isA repeatedly rabbled .and is sprinkled by edv path of sufficient vto effect the desired reduction of ,temperature when combined with the additional cooling effect of the air current 1nduced over ,the ore. In this way the heat of 'vaporization ofpthe'water is taken from the freshly vexposed ore,

while the direction of the-current ofl air is against the movement ofthe vore so that the coolest air meets the coolest orel at the outer periphery of vthe In Figs'. 5 and 6, the'table 4 is rotatable andthe rabbles 9 are stationary, whereas the ore is charged ontovthe table near the center thereof and is discharged at the outerA periphery into a suitable receptacle, such as the car indicated in outline in broken lines. In addition to the current o'f cooling air induced over the ore, and the stationary water sprinkling system, heat is alsoA abstracted from the ore by water circulated vin the hollow linteri )r'30 of the table and provision is made for drawing, air throughthe ore bed. The circulating cooling water is supplied from a pipe 31 communicating with a suitable source and-with the hollow interior32 of the driving shaft.' Conduite 38 fixed in the hollow interior of the table communicate thewater near the outer periphery of the l the waterpasses back through the discharge pipes 34, when it "reaches the required level, and outthrough the stationary pan 35 and outlet 36. In this Way Lheat is conducted from the ore through the table to this'circulating coolingfwater. The table is also provided with a plurality of radially arranged narrow inclosed pasentirely through the table Without permittingpthe leakage of water from ,the hollow interior of the table, for

the purpose of passing air through the ore Furthermore, the -ore is charged outer peripheryby the outermost rabble 9a into a conduit 12 located .at the proper Vplace to catch the ore falling '70 from the table.` In addition tovv the cooling the places indicooling the liquid to a degree yto amazes f the lower set being stationary. 'The ore is charged onto the outer periphery ofthe upper table and discharged from a point near the center thereof to a point near the center of the lower table, and thence to the louter periphery of the lower table into the discharge conduit, so that the ore vis moved,

through a substantially spiral path on each of the tables. vCurrents of cooling air may i bev induced over or-through the orel on each of the tables, and the ore on either or both tables may be additionally cooled by sprinkling 'with lliquid from distributing pipes, stationary or rotatable, as .the case may lrequire, or by the conduction of -heat from the ore to a circulating liuid in the manner Sinnilar to that previously described for carrymgA out each of these features. The pipe. 31 is intended to supply water for cooling .the ore on the lower table by conduction, as in Fig. 5, while the spray pipe 20 is intended' to spray water on the freshly overturned ore on the lower table, asin Fig. 3.. Furthermore, the lower table is provided with inclosed passages, as in Figs. 5 and 6 forpassing cooling air through the bed of ore.

Having thus described my invention, what I claim is :yI

1. In apparatus for cooling hot ore or the like, the combination 'with a Hat circular cooling table for supporting the ore m a comparatively thin layer, means for charg-A ing the 'ore onto the table, means for discharging the ore from the table, rabbles for rabbling the ore on the table and for effecting movement of the ore froml the place of charge to the place of discharge; a hood inclosing said table vand rabbles, a

stack at the top of said hood to conduct the dust and gases away from said rabbles and to insure a circulation of a-ir for progressively cooling the ore on the table during its movement from the place of charge to the place of discharge; substantially 'as dscribed.

'2. In an apparatus for cooling hot ore or the like, the combination with two superposed flat cooling tables for supporting the ore in a comparatively thin layer, means 'for charg ing the ore onto theupper table near the periphery thereof in aI comparatively thin layer, means for' discharging the ore from the upper table near the center thereof onto the lower table, means for discharging the ore from the lower table near the'periphery thereof, and rabbles f or rabbling the ore and for effecting movement of the ore from the place of charge to the place of discharge lof each table; of means for progressively cooling theore with air duringits n'iovenientV across each table from the place of charge to the place of discharge, the dow of air being in a direction opposed to that of the movement of ore; substantially as described.

-3. In apparatus for eoolinghot ore or the like, the combination with a dat circular'rotatable cooling tablev for supporting o re in a comparatively thin layer, means for rotating the table, means for charging the ore onto the table, means for discharging the ore from the table, and stationary rabbles for rabbling the ore and foreecting movement of the ore fromthe place of charge to ythe place of discharge; of means for spraying Water immediately behind each rabble for progressively cooling the ore on the 'table during its movement from the place of charge to the place of discharge;substantially as described. f

' 4:1 AIn apparatus for cooling hot ore or th like, the combination with a circular table for 'supportingvthe ore, means for charging the ore onto the table nearv its center, means for discharging the ore fromv'the table near its periphery, and rabblesfor rabbling the ore and for effecting movement of the ore from the place of charge to the place of discharge; of means for conducting a circulating Huid cooling medium within-the table from the periphery toward the center in such manner that heat from the ore' is trans ferred to the, fluid by conduction through the table; substantially as described.

5. in apparatus forcooling hot ore or the like, the combination with 'a rotatable hollow shaft, a circular supporting hollow table for the ore fastened to the shaft, means for charging'the ore onto the table, means for discharging the ore from the table, and rabbles for rabbling the ore and for eecting movement of th'e ore from the place of charge to the place of discharge; of conduits connecting the hollow interior of the table with the hollow interior of the shaft and with a discharge outlet to conduct a current of Huid cooling medium therethrough for cooling the cre on the table substantially as described.

6. In apparatus for cooling hot ore or the y like, the combination with a table for supporting ore, said table having air openings, means for charging ythe ore onto the table, means for discharging the ore from the table, and rabbles for rabbling the ore on the table and for effecting movement of the ore from the place of charge to the place of discharge; of a sprinkler for sprinkling liquid on the ore during its movement across said table and means for circulating air [through the openings in said table; substantially asdescribed.

7 In apparatus for' cooling hot ore or the like, the combination with a tablefor supporting the ore, means for charging the ore onto 4the table, means for discharging the ore from the table, and rabbles'for rabbling the ore and for eecting movement ofthe ore from the place of charge to the place o discharge; of a plurality of narrow passages'through the table for the purpose of inducing a current of air throughthe ore; substantially as described.

8. In apparatus for cooling hot ore orA the like, the combination with a table for supporting the ore, means for charging the ore onto the table, means for discharging the ore from the table, and rabbles for rabbling lthe ore and for eiiecting movement of the ore from the place of charge to the-place of discharge; of means for conducting a circulating Huid cooling medium within the table in such'manner that heat from the ore is transferred to the uid by conduction through the table, and a plurality .of radially arranged narrow A.passages passing through the table. and closed to the cooling medium within the table for thepurposefol1 inducing a current of air through the ore on the table;gsubstantially as described.

In testimon whereof I alii); my signature, 1n presence o two witnesses.

wLLrAM H. HUBBARD, JR.

Witnesses: EUGENE H. LAWS,

RosooE J. DENISTON. 

